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Schematic Diagrams, Overlays, and Parts Lists
: UHF Band 2
100pF
C246
L242
2.7pF
C245
18nH
22nH
R244
15K
L273
L271
27nH
390nH
390nH
L281
L241
CR243
R245
240
C273
1
A1
A2
2
0.1uF
1
3
2
CR241
Q241
BFQ67W
4.3pF
C250
C256
5.1pF
C289
1.5pF
100pF
2.2uF
C276
C253
SHIELD
SH241
1
C297
C281
.01uF
1
2
3
DD
100pF
L243
RESONATOR
C244
TX_IADJ
1
TX_OUT
10
TX_SWITCH
13
VCC_BUFFERS
14
VCC_LOGIC
18
3pF
RX_EMITTER
6
RX_IADJ
2
RX_OUT
8
RX_SWITCH
7
SUPER_FLTR
3
TRB_IN
19
TX_BASE
16
TX_EMITTER
15
COLL_RFIN
4
FLIP_IN
20
GND_BUFFERS
11
GND_FLAG
9
17
GND_LOGIC
PRESC_OUT
12
RX_BASE
5
50U54
U241
30
R248
C247
C248
100pF
0.1uF
100pF
C255
C251
100pF
4
1
3
1.1pF
C272
100pF
Q261
2
C241
C254
CR242
3.3pF
CR251
270
R252
5.1pF
C252
390nH
L251
33
R242
120
4
1
3
R251
Q260
2
C271
1pF
L282
390nH
10K
R243
7.5K
R253
C285
100pF
0.1uF
C286
L253
RESONATOR
1
P1
P2
2
P3
3
4.3pF
C242
4.3pF
C243
R241
18
R254
8.2K
1K
R260
Rx_sw
Tx_sw
SHIELD
SH242
1
Rx_sw
Tx_sw
RX_INJ
AUX3
AUX4
5V
VCTRL
PRESC
TX_INJ
VSF
VSF
VCO TOP SHIELD
VCO BOTTOM SHIELD
Figure 4-41:
UHF (450–512 MHz) Voltage Controlled Oscillator Schematic Diagram
Содержание PR860
Страница 1: ...PR860 Two Way Portable Radio Detailed Service Manual ...
Страница 2: ......
Страница 5: ...iv Notes ...
Страница 9: ...viii Table of Contents Notes ...
Страница 13: ...Notes xii List of Figures ...
Страница 17: ...1 4 Introduction Radio Model Information Notes ...
Страница 51: ...2 34 Theory of Operation Voltage Control Oscillators VCO Notes ...
Страница 81: ...4 4 Schematic Diagrams Overlays and Parts Lists Flex Layout Notes ...
Страница 193: ...4 116 Schematic Diagrams Overlays and Parts Lists Low Band Section Notes ...
Страница 196: ......